Carlos Ballesteros

Created a Windows and macOS workspace combining files, notes, diagrams, and task management with Svelte, TypeScript, and Tauri.

• Owned product design, architecture, planning, and implementation from scratch
• Used AI-assisted development while retaining direct control of key technical decisions
• Implemented feature flags, progressive releases, and infrastructure ready for scalability

Outcome: Delivered a viable product with an iterative delivery roadmap.

Improved architecture and developer productivity for a GTA V platform, simplifying systems and delivery workflows.

• Cut compilation times by 50% and enabled full IDE debugging
• Added Datadog and PostHog observability to trace server events and performance problems
• Migrated JavaScript to TypeScript; documented and taught Kotlin coroutines to developers

Outcome: Greater team autonomy and faster feature delivery.

Created and maintained a Kotlin Multiplatform game engine and reusable libraries for desktop, web, and mobile.

• Built graphics, audio, I/O, data structures, serialization, and developer tooling
• Led an international open-source community and maintained the ecosystem for eight years

Outcome: Adopted in commercial products including InVideo.